> For the complete documentation index, see [llms.txt](https://docs.openappsec.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openappsec.io/troubleshooting/troubleshooting-guides/installing-open-appsec-on-centos-7.md).

# Installing open-appsec on CentOS 7

#### Issue 1: Outdated Packages

**Symptom:** Installation fails due to outdated packages.

**Troubleshooting Steps:**

1. Run the following command to update your system packages:

   ```sql
   yum update
   ```

#### Issue 2: Missing Libraries

**Symptom:** The installation process reports missing libraries.

**Troubleshooting Steps:**

1. Install the libicu library by executing:

   ```
   yum install libicu
   ```
2. Install the EPEL repository release:

   ```arduino
   yum install epel-release
   ```
3. Install the nghttp2 library:

   ```
   yum install nghttp2
   ```
4. Run the ldconfig command to update the system library cache:

   ```
   ldconfig
   ```
5. Install the libpsl library:

   ```
   yum install libpsl
   ```
6. Move the libpsl library to the correct version:

   ```bash
   mv /usr/lib64/libpsl.so.0 /usr/lib64/libpsl.so.5
   ```

#### Additional Notes:

* Ensure that you have the necessary permissions to execute these commands.
* Double-check your internet connection to ensure successful package downloads.


---

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